[Init] Initial commit - NetMesh terminal manager

components/terminal/runtime/terminalPerCharacterInput.test.ts

@@ -0,0 +1,69 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+
+import {
+  MAX_RAW_PASTE_PER_CHARACTER_LENGTH,
+  getTextInputWireChunks,
+  shouldSplitImeTextInputForWire,
+  shouldSplitRawPasteInputForWire,
+  splitTextIntoCodePointWrites,
+} from "./terminalPerCharacterInput";
+
+test("splitTextIntoCodePointWrites keeps surrogate pairs on one write", () => {
+  assert.deepEqual(splitTextIntoCodePointWrites("a中👍b"), ["a", "中", "👍", "b"]);
+  assert.deepEqual(splitTextIntoCodePointWrites("👍"), ["👍"]);
+  assert.deepEqual(splitTextIntoCodePointWrites(""), []);
+});
+
+test("IME commits with more than one character split per character", () => {
+  assert.equal(shouldSplitImeTextInputForWire("中国"), true);
+  assert.equal(shouldSplitImeTextInputForWire("abc"), true);
+  assert.equal(shouldSplitImeTextInputForWire("中a👍"), true);
+});
+
+test("single-character IME commits keep the single write", () => {
+  assert.equal(shouldSplitImeTextInputForWire("中"), false);
+  assert.equal(shouldSplitImeTextInputForWire("👍"), false);
+  assert.equal(shouldSplitImeTextInputForWire(","), false);
+  assert.equal(shouldSplitImeTextInputForWire(""), false);
+});
+
+test("IME commits carrying escape sequences never split", () => {
+  assert.equal(shouldSplitImeTextInputForWire("\x1b[200~中\x1b[201~"), false);
+  assert.equal(shouldSplitImeTextInputForWire("\x1b[0;;200u"), false);
+  assert.equal(shouldSplitImeTextInputForWire("\x1ba"), false);
+});
+
+test("short raw pastes split per character", () => {
+  assert.equal(shouldSplitRawPasteInputForWire("10.1.2.3"), true);
+  assert.equal(shouldSplitRawPasteInputForWire("中文"), true);
+  assert.equal(shouldSplitRawPasteInputForWire("ab"), true);
+  assert.equal(
+    shouldSplitRawPasteInputForWire("a".repeat(MAX_RAW_PASTE_PER_CHARACTER_LENGTH)),
+    true,
+  );
+});
+
+test("single-character and long raw pastes keep the single write", () => {
+  assert.equal(shouldSplitRawPasteInputForWire("a"), false);
+  assert.equal(
+    shouldSplitRawPasteInputForWire("a".repeat(MAX_RAW_PASTE_PER_CHARACTER_LENGTH + 1)),
+    false,
+  );
+  assert.equal(shouldSplitRawPasteInputForWire(""), false);
+});
+
+test("raw pastes containing escape sequences never split", () => {
+  assert.equal(shouldSplitRawPasteInputForWire("\x1b[200~ab\x1b[201~"), false);
+  assert.equal(shouldSplitRawPasteInputForWire("\x1b[A"), false);
+  assert.equal(shouldSplitRawPasteInputForWire("a\x1b"), false);
+});
+
+test("wire chunking honors the per-character request only for plain text", () => {
+  assert.deepEqual(getTextInputWireChunks("ab", false), ["ab"]);
+  assert.deepEqual(getTextInputWireChunks("ab", true), ["a", "b"]);
+  assert.deepEqual(getTextInputWireChunks("a中👍", true), ["a", "中", "👍"]);
+  assert.deepEqual(getTextInputWireChunks("\x1b[200~ab\x1b[201~", true), [
+    "\x1b[200~ab\x1b[201~",
+  ]);
+});